1143533000 has 64 divisors (see below), whose sum is σ = 2703682800. Its totient is φ = 452659200.

The previous prime is 1143532967. The next prime is 1143533047. The reversal of 1143533000 is 3353411.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 26770276 + 1116762724 = 5174^2 + 33418^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91106 + ... + 102894.

Almost surely, 2^1143533000 is an apocalyptic number.

1143533000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1143533000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1351841400).

1143533000 is an abundant number, since it is smaller than the sum of its proper divisors (1560149800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1143533000 is a wasteful number, since it uses less digits than its factorization.

1143533000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11907 (or 11893 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 1143533000 is about 33816.1647736700. The cubic root of 1143533000 is about 1045.7219738610.

Adding to 1143533000 its reverse (3353411), we get a palindrome (1146886411).

The spelling of 1143533000 in words is "one billion, one hundred forty-three million, five hundred thirty-three thousand".